PH Stainless Steel — Steel Products by Mailong Metal
PH Stainless Steel
PH Stainless Steel — Precipitation-Hardening High-Strength Solution
PH stainless steel, also known as Precipitation-Hardening Stainless Steel, is a high-strength, corrosion-resistant alloy designed for demanding applications where both excellent mechanical properties and durability are required. Through controlled heat treatment—solution treatment, quenching, and aging—PH stainless steels achieve exceptional hardness and strength unmatched by standard stainless steels.
mailongmetals supplies a full range of PH stainless steel grades, including:
17-4PH (AISI 630), 15-5PH, 13-8Mo, 17-7PH, 17-4LH
And other special grades according to customer requirements.
Our products fully comply with ASTM, AMS, JIS, GB, and other international standards, offering reliable performance in aerospace, petrochemical, nuclear, marine, and precision machinery industries.
High Strength After Aging Treatment
Strength levels far exceed those of standard stainless steels, making them ideal for high-load components.
Excellent Corrosion Resistance
Comparable to 304 and 316 stainless steel in most industrial and marine environments.
Good Toughness & Fatigue Resistance
Maintains mechanical integrity under cyclic loads and harsh service conditions.
Precision, Stability & Low Deformation
PH steels retain dimensional accuracy after heat treatment, suitable for precision-engineered parts.
Wide Range of Mechanical Properties
Mechanical strength can be adjusted by varying aging temperature (H900, H1025, H1150, etc.).
Good Machinability
Better machinability than austenitic stainless steel after aging hardening.
- Most widely used PH grade
- High strength + good corrosion resistance
- Suitable for aerospace, chemical equipment, valves, and shafts
- Better toughness than 17-4PH
- Clean microstructure, excellent strength
- Common in aircraft components, nuclear power, and high-pressure systems
- Exceptional toughness
- Excellent stress-corrosion cracking resistance
- Used in military aerospace, structural parts
- High strength + high-temperature stability
- Ideal for springs, diaphragms, and precision mechanical parts
- Aerospace & Defense
- Petrochemical & Energy
- Marine & Offshore
- Precision Engineering
- Nuclear & Power Generation
- Full stock of PH stainless steel grades (17-4PH, 15-5PH, 13-8Mo) in all forms
- Custom heat treatment and aging available (H900, H1025, H1150, etc.)
- Precision machining and customized component fabrication
- Aerospace & defense certifications (AMS 5604, AMS 5655, etc.)
- Full material traceability with comprehensive test reports
- Expert technical support for material selection and heat treatment
1. What is PH stainless steel?+
2. What industries use PH stainless steel?+
3. What's the difference between common PH grades like 17-4PH and 15-5PH?+
4. What are the most popular PH stainless steel grades?+
5. What temperature range can PH stainless steel handle?+
6. How does PH stainless steel resist corrosion?+
7. What product forms are available?+
8. Is PH stainless steel weldable?+
9. What makes PH stainless steel ideal for aerospace?+
10. How do I select the right PH grade for my application?+
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